13638250 has 32 divisors (see below), whose sum is σ = 27041040. Its totient is φ = 5132800.

The previous prime is 13638239. The next prime is 13638253. The reversal of 13638250 is 5283631.

It is a Cunningham number, because it is equal to 3693²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 1687401 + 11950849 = 1299^2 + 3457^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13638253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2646 + ... + 5854.

Almost surely, 2^13638250 is an apocalyptic number.

13638250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13638250 is a deficient number, since it is larger than the sum of its proper divisors (13402790).

13638250 is a wasteful number, since it uses less digits than its factorization.

13638250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3243 (or 3233 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 13638250 is about 3693.0001353913. Note that the first 3 decimals coincide. The cubic root of 13638250 is about 238.9202070192.

The spelling of 13638250 in words is "thirteen million, six hundred thirty-eight thousand, two hundred fifty".